PVC membrane structure composite was etched with Na OH chemical-etching process and a micro-rough geometric structure was obtained, which is beneficial for the adsorption and deposition of SiO_2 particles. To achieve the superhydrophobic and self-clean functions, the PVC composites would be further treated through chemical composition and optimal micro-nano-binary structure together. The results show that the size of the Si O_2 nano-particles could be adjusted by the number of crystal nucleus through controlling the mole ratio between n(NH3·H2O):n(TEOS). When the mole ratio is 0.4:1, the size of Si O_2 nano-particles is ranged from 70 to 80 nm. After processing with the low-surface-energy materials, the surface energy of the PVC has fallen from 40 to 5 m N/m and the WCA increases from 81o to 152o, suggesting that the PVC membrane structure composite shows the superhydrophobic and self-cleaning functions.
Rare Metal Materials and Engineering
Si O2 nanoparticle
PVC membrane structure composite